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Guide To Develop A Single Page App From Scratch

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  • Publish Date: 15 Nov, 2025

    Written by: Ritesh Jain

In today’s world, having a website is really important if you run an online business. But just having a website isn’t enough anymore; users expect fast-performing websites that load in a fraction of a second. When potential customers visit your site to shop and experience slow loading times, they become frustrated and may leave. This is why many businesses suffer losses. So, what’s the solution? The answer is Single Page Applications (SPAs).

Basically a single page app is a type of web app that doesn’t load new pages every time you click something. Instead, it loads one main page and updates the content using JavaScript without having to reload the whole page. SPAs are becoming more and more popular among businesses; in fact, many small and large companies have already developed single page apps, and you might even use some of them. As enterprises worldwide embrace SPAs to create smooth web experiences, why should you be left behind?

So, if you’re thinking to develop a single page app from scratch, then this blog is definitely for you. Keep reading to learn more!

What Is A Single Page Web Application?

Have you ever used apps like Netflix, Facebook, or Gmail? Even though these apps are built for different purposes, they share something in common. Any guesses? They are all single page applications. SPA apps are a type of web application that loads just one main page. Yes, you read that right. Instead of reloading the entire page when you click on something, it only updates the part of the page that needs change.

When you first visit a single page web application, your browser loads the main page along with all the files it needs, like the HTML. Then, when you interact with the app, like clicking a link, the app doesn’t reload the whole page; it uses JavaScript to ask the server for only the new data it needs. The new data comes in a format like JSON, and JavaScript updates the page right away, without a page refresh.

Pros And Cons Of Single Page Web Application

Do you have doubts about whether you should invest in single page app development services or not? We understand it’s a big decision for your business, so you want to know both the positive and negative aspects of building a single page application. It’s a wise choice, as it will keep you prepared for what to expect when you make a one page app, allowing you to make the right choices.

In this section, we will explore both the advantages and disadvantages of single page application development services. Let’s have a look:

Pros And Cons Of Single Page Web Application

Pros

1. Faster Loading Times

The average website loading time is under 2.5 seconds, so your site should load in that time; otherwise, visitors will get irritated and leave. But that’s not the case with Single Page Apps, as they load faster than traditional websites. After the initial load, they only update the content you interact with instead of reloading the whole page. Although the first time you visit the site might be a bit slow due to initial downloads, the rest of the experience is much faster.

2. Better Caching Capabilities

Websites generally face caching issues, but single page app architecture is designed differently as they store data on your device after the first visit. This means that when you visit again, the app doesn’t need to reload everything. The data is cached, or saved locally, making future visits much faster. The best part is that if your internet connection is slow, the single page app can still work using the cached data.

3. Works Offline Too

One of the best traits of a one page web app is that it can even work without an internet connection. After the app loads the first time, it stores data on your device. This means you can keep using the single page application web even if the internet goes out. Once the connection is restored, any changes you made will sync with the server. Generally, users love and prefer apps that can work offline as well.

Cons

1. Not SEO Friendly

SEO services are very important for businesses in today’s digital era, as they can help increase visibility on search engines. Sadly, JavaScript single page apps can be hard to find on search engines, since all content is on one page, search engines struggle to read and index the content. This means that your app may not rank well for different keywords because search engines prefer websites with multiple pages and URLs.

2. Compatibility Issues With Older Browsers

Another downside of one page apps is that they often don’t work well on older browsers that don’t support newer technology. This can make the app crash or not work correctly on older devices. Web app developers need to ensure the app works on different browsers. Some browsers may also have trouble displaying single page application sites correctly, especially if they don’t support the latest web features.

3. Security Challenges

Single page apps are more vulnerable to security issues like cross-site scripting (XSS), where hackers can insert malicious code into the app. Since SPAs rely heavily on JavaScript, if user inputs aren’t carefully checked, attackers can inject harmful scripts. Additionally, SPAs may store sensitive data on the user’s device, which could be exploited if not handled correctly.

Trust Us To Build Your Single Page App That Works Much Smoother & Faster Than Traditional Web Apps.

Key Features Of One Page App

Do you know the reason behind the immense popularity and adoption of single page application websites? Well, all the credit goes to its amazing features, which are:

Feature Description
Simpler Development Since only one page loads, building SPAs is simpler compared to multi-page apps.
Dynamic Content Loading Single page apps only load the needed data, making the app faster.
App Like Experience One page application is easy to use and gives the feeling that you are using a regular mobile or desktop app.
Works On Any Device Single page web app work across different devices and systems, such as smartphones, tablets, and PCs.
Real-Time Updates These web apps can update live content like chat or news without reloading the page.
Offline Access SPA architecture stores data locally, so you can use the app even with no internet connection.
Consistent Experience Users get the same look and feel no matter what device or browser they use.

Single Page Application Vs Multi Page Application: Major Differences

Enterprises often get confused about whether they should develop a single page app or a multi page app. To help you make the right decision, we have created a table below that shows the key differences between one page and multi-page apps.

Key Aspect  Single Page App  Multi Page App
Definition A web app that loads one page and updates content without reloading it. Refers to the app where every click loads a new page from the server.
User Experience Offers faster and smoother user experience. Can feel slower as each click reloads a whole new page.
Loading Time Loads faster after the first visit. Takes longer to load because the whole page reloads every time.
Development Complexity Level Easier. More complex.
Offline Support Can work offline. Requires an internet connection.
Development Cost Cheaper. Expensive.
Best For Great for apps like social media, messaging, and email. Best for websites like blogs, e-commerce, or news sites with many pages.
Real-Life Example Gmail and Facebook. Amazon and eBay.

How To Develop A Single Page Application?

When you decide to develop a single page app from scratch, it’s best to hire SPA developers from a trusted web app development company USA. They are professionals and will help you develop your one page app in the right way.

The stages involved in a single page development are:

How To Develop A Single Page Application?

1. Project Discovery

The very first step of single page app development involves studying the SPA app market, conducting competitor analysis, identifying the target audience, collecting business requirements, and preparing a project roadmap. You will decide what problem your app will solve and what features you are going to add. This stage will act as your guiding light in the further development process.

2. UI/UX Designing

In this phase, UI/UX designers will start designing the user experience and user interface of your single page app. They will create an eye-pleasing, responsive, and clean UI/UX that will make it both easy and enjoyable for users to use the app. App designers will choose the best colors, themes, typography, and graphic elements that will make your app look attractive. They will also create the wireframes and mockups to show the app’s layout and functionality.

3. Selecting The Tech Stack

Single page web app developers have to be very careful when picking the tech stack to develop a single page app from scratch. Although the best tech stack depends on project to project, the popular ones are:

Component  Tools And Technologies 
Frontend JavaScript, React and Angular
Backend Node.js, Python and Ruby
Database MongoDB and PostgreSQL
Server Apache, Nginx
APIs RESTful APIs or GraphQL
Testing Frameworks Jest, Cypress and Enzyme

4. MVP Development

It’s highly advisable to begin by developing an MVP, or minimum viable product of your single page app. Why? Because rolling out an MVP first will give you an idea of how your SPA app will perform. If there are any changes to be made, you can easily make them. If you get a great response to the MVP, you can ask your SPA app developers to move forward with developing a fully functional single page web app.

5. Testing & Launch

Testing is one of the most important and unignorably parts of the single page app development process. A QA analyst will thoroughly test the app to identify bugs or glitches and fix them before they affect user experience. Once the app testers give you the green signal that all the issues have been resolved, you can deploy the app. Keep monitoring the performance of the SPA app even after the launch and make necessary changes if needed according to users’ feedback.

How Much Does It Cost To Build A Single Page App?

If you think that creating a single page application is more expensive, then no, that’s not the case. It is really cost-effective in comparison to building multi page apps. The single page application development is influenced by numerous factors, including app complexity, features added, UI/UX design, single page app development company’s location, and testing. Once you understand these factors, it will be easy to determine the cost. On average, the cost can start around $1,000.

Now, let’s understand the cost to develop a single page app from scratch based on different complexity levels.

App Complexity  Estimated Cost 
Simple SPAs $1,000 to $10,000
Mid-Level SPAs $10,000 to $50,000
Complex SPAs $50,000 to $1,00,000+

To get a personalized quote, feel free to reach out to our team, or you can try using our cost calculator.

Prominent Single Page App Examples

There are many popular mobile applications built on the SPA model that are used worldwide and have become very successful and profitable. In this section, we’ll explore some of the top single page web applications that can serve as great sources of inspiration for businesses looking to make a SPA app.

Prominent Single Page App Examples

1. Facebook

Facebook is a renowned SPA app that enables users to connect with people worldwide through photos, videos, and shared updates. You can check posts, see notifications, and chat with friends without the page reloading.

2. Gmail

Gmail is a single page app by Google to send, receive, and manage emails. When it loads, the top bar and side menus stay the same while you read or write emails. You can switch inboxes and send messages instantly without refreshing everything each time.

3. Google Docs

It is another great example of a single page app that lets you type, edit, and share documents online. It’s part of Google Workspace and helps people write and collaborate from desktops or smartphones anywhere.

4. Google Maps

Google Maps lets you search for places and explore routes without reloading. Built with smart web tools, it updates locations instantly. The app uses JavaScript to create real-time movements and offers a fast, interactive experience.

5. Trello

Trello is basically a project management single page app that helps teams organize projects using boards, lists, and cards. Everything updates instantly, ensuring all teams work smoothly and in coordination.

Supercharge Your Business With A Fast-Performing Single Page Web App (1)

Partner With Helpful Insight To Develop Feature-Rich SPA Apps

Single page applications are the future of web development and have made a strong impact in the app development industry. They provide a faster and smoother user experience by smartly loading content without refreshing the entire page. Apps like Facebook, X (formerly Twitter), Google Maps are prime examples of the success stories that SPAs have created. Do you want your app to be as successful as these? Let’s build it together at Helpful Insight.

We are a prominent web app development company in USA that has years of experience in developing customized and high-performing single page apps from scratch. At Helpful Insight, we have a team of highly qualified web app developers who can create different types of SPAs that perfectly fit your business needs and budget.

So, what are you waiting for? Hire dedicated developers from us and see how we will transform your app concept into a full-fledged app.

FAQs

Businesses should opt to build a single page application when they want to offer a fast, smooth, and app-like user experience. They are great for apps where users need real-time updates and quick actions like social media apps or dashboard.

The single page application development timeline varies based on a wide range of factors, such as project scope, feature complexity, UI/UX design, tech stack chosen, and the web app development team’s expertise. Creating simple apps may take less time in comparison to complex ones.

To know the accurate duration, share your project requirements with our team, and we will equip you with all the timeline details as soon as possible.

React, Angular, Vue.js, Next..js, and Ember.js are counted among the best single page app frameworks used by web app development companies to build SPAs.

Some of the key challenges of the SPA model are:

  • Slower initial loading time.
  • Higher security risks.
  • Dependency on JavaScript to function.
  • Difficult to implement web analytics.

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Ritesh Jain
Ritesh Jain

Director and Co-founder, HeIpful Insight

My name is Ritesh Jain. I am the Director and Co-founder at HeIpful Insight, I provide strategic leadership & direction to guide the company's growth. My responsibilities encompass overall business development, fostering client relationships, and ensuring the alignment of our services with industry trends. I actively contribute to decision-making, drive innovation, and work closely with our talented teams to uphold our commitment to delivering high-quality Mobile and Web Development Solutions.

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